382 Froceedinz/s of the Rotjal Irish Academy. 



Acetonitroglucose and acetonitrogalactose hare been converted into 

 alkyl liexosides. From acetonitromaltose lieptacetyl-j8-methyl malto- 

 side was similarly obtained. 



' It tas been shown by Eyan and Mills^ that, by the direct action 

 of acetyl chloride on arabinose, a well-crystallized acetoehloroarabinose 

 can be obtained. Chavanne, by the same method, afterwards^ re-dis- 

 covered the substance, obtained the corresponding aeetobromoarabi- 

 nose, and converted it into a crystallized tetracetylarabinose. 



From acetoehloroarabinose, as mother-substance, we have obtained 

 the arabinosides of carvacrol, ortho cresol, /3-naphthol, and methyl 

 alcohol. The new glycosides resemble the corresponding phenolic 

 hexosides in their appearance and behaviour. 



Preparation of Acetochloroarahinose. 



The method of obtaining this compound has been briefly described 

 in a previous paper. ^ In further preparations the method which was 

 found most convenient was to allow acetyl chloride (4 mols.) to act 

 on dry, powdered arabinose (1 mol.) in a small flask (fitted with a 

 calcium chloride tube to prevent the entrance of moisture), until the 

 mixture had solidified to a crystalline magma. Dry chloroform was 

 then added, and the action allowed to go on until complete solution 

 was effected. 



The chloroform solution was shaken in a funnel, washed first with 

 water, then with sodium carbonate, separated, passed through a dry 

 filter, dried with anhydrous sodium sulphate, and the chloroform dis- 

 tilled off in vacuo. 



The yield from five grams of arabinose was generally seven and 

 a half grams of crystalline acetoehloroarabinose, which was sufficiently 

 pure for conversion into phenolic glycosides. The properties of the 

 substance given by Chavanne {loc. cit.) are almost identical with those 

 previously given by Eyan and Mills {loc. cit.). 



The acetoehloroarabinose, which is a well-crystallized compound, 

 and comparatively stable in the air, is a more convenient mother- 

 substance for the preparation of glycosides than the impui-e syrupy 

 acetochloroglucose and acetochlorogalactose previously employed. 



1 Joum. Chem. Soc, 1901, p. 706. 



"^ Comptes Rendus, cxxxiv. , 1902, p. 661. 



2 Eyan and Mills, Joum. Chem Soc, 1901, p. 706. 



